MP5031 Cable Orientation Detection

DC-DC Power Converters
1

Hi,

I would like to detect the Type C plug orientation with MP5031 to control the HD3SS3212 high speed signal mux. It says in the datasheet " POL output. GPIO2 is an open-drain output that indicates the plug orientation. If CC1
is selected as the CC line, then POL is pulled low. If CC2 is selected as the CC line, then
POL is an open drain "
I didnt understand this. Does it mean GPIO2 is low when the cable plugged one side and high when plugged other side ? The other question is, I would like to communicate with an MCU which works with 3.3V, should i use level shifter for i2c ?
Thanks

2

I built a device on the other end that was receiving 45W over the USB-C and transmitting data back on the SS pair. At that end yes the POL pin controls the MUX to select the SS pins that are active.

Your MUIX looks like it runs on 3.3V So I think the MCU and MUX can share the POL information just have the POL pullup go to 3.3V.